With a specific windows 7 computer using NPM, I can not add that node even though everything is in place and I managed to add other windows 7 nodes.
I configured trap on that box and tried a wrong community while adding the node and this resulted in different traps:
I tried everything but when I add it the node I get snmp failure while verifying snmp
I have heard Win 7 has a built in Firewall that kills SNMP. Did you shut that feature off?